16.2: const - Topics of JavaScript/ES6 

i know Im asking the wrong place but does anyone know of a trick to log back into an instagram account?? I was stupid forgot the password. I love any tricks you can offer me!

@Kashton Sebastian instablaster =)

@Anakin Julio Thanks so much for your reply. I found the site thru google and Im trying it out now. I see it takes a while so I will get back to you later when my account password hopefully is recovered.

yes and he's pretty funny too, I love his videos

Definitely ,,,,,, 👌a best teacher

Welcome aboard!

Great point!

Never thought about that, thanks!

Thanks, great point!

also in react.js to declare components

Thanks for this clarification. I am considering redoing this video as I overemphasized non-existent optimization benefits and de-emphasized the code maintenance benefits! Thank you for commenting!

While premature optimization is worst thing possible you could do, doesn't mean you should completely stop thinking about it (just like what pretty much 99% of people do once they hear that it's "evil"). If you know that variable will never change, make it constant, it doesn't change readability in any way and it's free optimization which doesn't slow down your progress by any means... There's no reason to "oh I'll change all 300 variables, if I need a little bit more performance, that never change later, that's fun thing to do, right?", how about just do it right now.

Thanks, I am very behind the times!

Actually, none of them are equivalent to "function go() {}", as a named function is defined as soon as its surrounding function/script is executed, while an anonymous function declared as a variable is only defined when its line is reached. go() // logs "Hello!" function go() { console.log("Hello!") } ...and go() // Uncaught TypeError: go is not a function var go = function() { console.log("Hello!") } ..and go() // Uncaught ReferenceError: go is not defined let go = function() { console.log("Hello!") }

Ola Kaldestad okay, so it is not equivalent to var go() = function(), but this does mean that functions are hoisted, which is great!

Remember it will hoist the variable "go" and not it's content (the function).

Does this help? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--jysK0nlz7A.html

@@TheCodingTrain Awesome...sorry didn't explore ur whole channel yet...there is a lot to learn here and I'm loving it....thanks a lot again...

=> is the lambda

Thanks for this clarification!

ooops

It's not an oops for you. It's an oops for coding terminology in general. It's just such an awkward use of language. "It's constant because it can't change, but it's a variable because that's what we call labelled values in our programs because they're things we like to change."

mwtbones hahahaha

mwtbones: Well, if we can say "jumbo shrimp" and "virtual reality" and "living dead," why not?

The Coding Train HOW DARE YOU

yes, yes I am learning about this now, I should have done my research more before making this video! I might redo it.

No worries at all! It's still a great video and intro to ES6 variable assignment. :)

Wow, I love learning this about let! And yes, thank you for the comment about const and performance. I should have done my research more before making this video! I might redo it.

Well, I don't know whether there's a performance benefit, I just kind of doubt it. I haven't researched it either. I'm just speaking from what I've learned about other languages. So don't redo the video--it's fine, I think. One point you might make in general: Javascript, historically, has been rather "loose," i.e., no strict data typing, no need to declare variables, etc. While that seems nice and convenient, at first it becomes very inconvenient when you have large programs or projects, as you struggle with misspelled variable names, bugs from scoping errors, etc. So, I think one of the objectives of ES6 is to rectify this. That, and improve readability and maintainability. Don't get me wrong--I love your presentations. Your style is so inviting--especially to novices--as you present complex ideas as if they're no big deal. I can see from the comments that people love it. I think the thing I like best about you is that you never hesitate to get in front of the camera and start talking and coding and white-boarding, etc., whether perfectly accurate or not. You get the point across effectively and the mistakes are forgivable because of your self-deprecating sense of humor. Nonetheless, you deliver great value, and a whale of a lot of it! I've never seen so many videos from one person. The only thing I could do without is the occasional random number readings. ;-)

thank you for the nice feedback!!

Try this one! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hNR6fsksEu8.html

And love ur videos! I'm learning so much from them! And maybe one more thing, could u take back the timed challenges? They where so amazing!!

Problem setting p5? Post in the Processing's forum. People will help you there.

Yup, this is very true! I might have to redo this video!

I believe it is. Once the variable is pointing to something, it cannot be changed in the same scope. I one major difference is you have to also initialize them to a value when declaring them, which I think you don't with Java's finals.

If you look at all the playlists you'll find them, I wish I had a better way to organize this!

my brain just exploded

You're welcome

I release the videos one at a time over time, but you can always find them in the playlists!

Hello Dan. How come I already watch this video? did you re upload?

I re-upload edited pieces of the live stream as stand-alone content, yes.

Omar Ahmad nope

#define is a preprocessor directive in C++, 'cause source code of C++ is compiled. A preprocessor directive is interpreted by a compiler. JavaScript is an interpreted language, so there is a compilation step called JIT by the interpreter. The compilation steps between JS and C++ aren't the sames.

Thanks for this clarification